/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/

package com.core.widget.pulltorefresh.internal;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Matrix;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

import com.b5m.b5mei.R;
import com.core.widget.pulltorefresh.PullToRefreshBase;

@SuppressLint("ViewConstructor")
public class IndicatorLayout extends FrameLayout implements AnimationListener
{
    static final int DEFAULT_ROTATION_ANIMATION_DURATION = 150;
    private Animation mInAnim, mOutAnim;
    private ImageView mArrowImageView;
    private final Animation mRotateAnimation, mResetRotateAnimation;

    public IndicatorLayout(Context context, PullToRefreshBase.Mode mode)
    {
        super(context);
        mArrowImageView = new ImageView(context);
        Drawable arrowD = getResources().getDrawable(R.drawable.indicator_arrow);
        mArrowImageView.setImageDrawable(arrowD);
        final int padding = getResources().getDimensionPixelSize(R.dimen.indicator_internal_padding);
        mArrowImageView.setPadding(padding, padding, padding, padding);
        addView(mArrowImageView);
        int inAnimResId, outAnimResId;
        switch (mode)
        {
            case PULL_FROM_END:
                inAnimResId = R.anim.slide_in_from_bottom;
                outAnimResId = R.anim.slide_out_to_bottom;
                setBackgroundResource(R.drawable.indicator_bg_bottom);
                // Rotate Arrow so it's pointing the correct way
                mArrowImageView.setScaleType(ScaleType.MATRIX);
                Matrix matrix = new Matrix();
                matrix.setRotate(180f, arrowD.getIntrinsicWidth() / 2f, arrowD.getIntrinsicHeight() / 2f);
                mArrowImageView.setImageMatrix(matrix);
                break;
            default:
            case PULL_FROM_START:
                inAnimResId = R.anim.slide_in_from_top;
                outAnimResId = R.anim.slide_out_to_top;
                setBackgroundResource(R.drawable.indicator_bg_top);
                break;
        }
        mInAnim = AnimationUtils.loadAnimation(context, inAnimResId);
        mInAnim.setAnimationListener(this);
        mOutAnim = AnimationUtils.loadAnimation(context, outAnimResId);
        mOutAnim.setAnimationListener(this);
        final Interpolator interpolator = new LinearInterpolator();
        mRotateAnimation = new RotateAnimation(0, -180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        mRotateAnimation.setInterpolator(interpolator);
        mRotateAnimation.setDuration(DEFAULT_ROTATION_ANIMATION_DURATION);
        mRotateAnimation.setFillAfter(true);
        mResetRotateAnimation = new RotateAnimation(-180, 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        mResetRotateAnimation.setInterpolator(interpolator);
        mResetRotateAnimation.setDuration(DEFAULT_ROTATION_ANIMATION_DURATION);
        mResetRotateAnimation.setFillAfter(true);
    }

    public final boolean isVisible()
    {
        Animation currentAnim = getAnimation();
        if (null != currentAnim)
        {
            return mInAnim == currentAnim;
        }
        return getVisibility() == View.VISIBLE;
    }

    public void hide()
    {
        startAnimation(mOutAnim);
    }

    public void show()
    {
        mArrowImageView.clearAnimation();
        startAnimation(mInAnim);
    }

    @Override
    public void onAnimationEnd(Animation animation)
    {
        if (animation == mOutAnim)
        {
            mArrowImageView.clearAnimation();
            setVisibility(View.GONE);
        }
        else if (animation == mInAnim)
        {
            setVisibility(View.VISIBLE);
        }
        clearAnimation();
    }

    @Override
    public void onAnimationRepeat(Animation animation)
    {
        // NO-OP
    }

    @Override
    public void onAnimationStart(Animation animation)
    {
        setVisibility(View.VISIBLE);
    }

    public void releaseToRefresh()
    {
        mArrowImageView.startAnimation(mRotateAnimation);
    }

    public void pullToRefresh()
    {
        mArrowImageView.startAnimation(mResetRotateAnimation);
    }
}
